#body .b_center{
    background-color: white;
    width: 1200px;
    /* height: 400px;*/
    margin: 25px auto 40px;
    border: 0;
    padding-bottom: 30px;
    /*box-shadow: 5px 10px 15px #ccc;*/
}
#body .b_center:hover{
    box-shadow: None;
}
#body .b_center .b_c_demo{
    width: 1200px;
    /*height: 420px;*/
    /*background-color: cyan;*/
    margin: 0 auto;
    margin-top: 15px;
    padding-bottom: 0px;
}
#body .b_center  .b_c_d_t{
    display: inline-block;
    width: 1200px;
    height: 38px;
    background-color: #7AA874;
    color: #F1F7E7;
    line-height: 38px;
    padding-left: 20px;
    font-size: 20px;
    box-sizing: border-box;
}
#body .b_center .b_c_demo .b_c_d_b{
    display: inline-block;
    width: 1200px;
    /*height: 246px;*/
    /*    background-color: pink;*/
}
#body .b_center .b_c_demo span{
    display: inline-block;
}

/*两个css共同作用      left      */
#body .b_center  .b_c_d_b .b_c_d_b_left{
   /* width: 570px;*/
    float: left;
    text-align: center;
}
#body .b_center .p_border{
    background-color: white;
    display: inline-block;
    box-sizing: border-box;
}
#body .b_center .p_border:hover{
    border: 1px solid #9bc0a8;
    box-shadow: 2px 2px 2px 2px lightgray;
}

/*两个css共同作用      right      */
#body .b_center  .b_c_d_b .b_c_d_b_right{
    /* height: 208px;*/
    /*   background-color: blue;*/
    float: left;
    box-sizing: border-box;
}

#body .b_center  .b_c_d_b .b_c_d_b_right .demo_par{
    text-decoration: dotted;
    letter-spacing: 0.5px;
}
#body .b_center  .b_c_d_b .b_c_d_b_right .demo_par:hover{
    color: #7AA874;
    font-weight:bolder;
}